Underfolio

Every trading day › 1991

The stock market on August 15, 1991

August 15, 1991, a Thursday. The S&P 500 fell 0.15% to close at 389.33. Of 5,736 US stocks that traded, 1,712 rose and 1,816 fell.

The S&P 500-0.15%closed at 389.33
How big a move#20,566of 24,799 trading days since 1928
$100 in the index since$1,979price only, to September 24, 2026
Stocks that rose1,712of 5,736; 1,816 fell
Biggest companyExxon Mobilby market value that day

Biggest rises among the 500 largest companies

Giant Food (GFS.A)+3.1%
Wells Fargo & Co. (WFC.Z)+3.1%
Pall Corporation (PLL)+3.0%

Biggest falls among the 500 largest companies

Salomon-15.0%
Sigma-Aldrich (SIAL)-7.5%
Storage Technology (STK)-5.9%

Stock moves count dividends; the index is price only. Market values after 2024 are estimates.

‹ August 14, 1991 · Every August 15 · August 16, 1991 ›

Ask the Lab what came after a day like this

History, not advice. How these numbers are made.